What is the CVSS score of CVE-2026-1363?

CVE-2026-1363 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2026-1363?

Within 24 hours: Identify all systems running IAQS and I6, isolate them from production networks if possible, and restrict access to trusted IP ranges only. Within 7 days: Contact JNC for a security patch timeline and interim guidance; implement a Web Application Firewall (WAF) with rules blocking manipulation of authentication parameters; audit recent access logs for suspicious activity. Within 30 days: Deploy the vendor patch immediately upon availability; conduct a full security audit of affected systems; reset administrator credentials and review all privileged account activities.

CVE-2026-1363

CRITICAL

Use of Client-Side Authentication (CWE-603)

2026-01-23 twcert@cert.org.tw

Information Disclosure

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

CVE Published

Jan 23, 2026 - 09:15 nvd

CRITICAL 9.8

DescriptionCVE.org

IAQS and I6 developed by JNC has a Client-Side Enforcement of Server-Side Security vulnerability, allowing unauthenticated remote attackers to gain administrator privileges by manipulating the web front-end.

AnalysisAI

IAQS and I6 systems by JNC have a client-side enforcement vulnerability allowing unauthenticated attackers to bypass security controls and access server functionality.

Technical ContextAI

The IAQS and I6 systems rely on client-side enforcement of server-side security (CWE-603), meaning security checks are implemented in JavaScript or the client application and can be trivially bypassed.